Post-coloring vacuum aluminum coating

Question one: The production principle, manufacturing process and product characteristics of vacuum aluminum plating after coloring?
Answer: The vacuum aluminum plating material is divided into the front coloring method and the post-coloring method on the processing. The Shanghai Green New product belongs to the “post-coloring method vacuum aluminum plating transfer paperboard”. The production principle is that in the vacuum environment, the aluminum powder is first transferred to the base paper through a transfer film, and then according to the customer's required color, a special transparent resin and dye are formulated into a coating for coloring. Because the coating used in the post-coloring method is like a protective layer, the product has a strong print adaptability, is easy to print, and better satisfies the adhesion of the printing ink, so it is called a good material for “pre-printing” by users.
Question 2: What are the special requirements for transportation and storage compared with composite aluminum foil materials?
Answer: The vacuum aluminum plating material produced by the post-coloring method has a good function of high temperature resistance, abrasion resistance and UV resistance, so it is not afraid of problems such as extrusion, oxidation, and cracking during transportation and storage, and composite aluminum foil materials. There is no difference in storage and transportation conditions.
Question 3: For manufacturers who have been using composite aluminum foil materials, after replacing vacuum aluminum plating materials, what adjustments should be made in inks, mechanical equipment, and processes, and there are several ways to make them economical and maintain the original printing materials. Hue?
Answer: In addition to ink formulations need to be adjusted, green new vacuum aluminum plating materials do not need to be adjusted in equipment, processes, etc. First of all, the printing method that the material can adopt is very flexible, suitable for gravure and offset printing, even if the screen printing does not produce ink explosion phenomenon. Secondly, the control of product hue is convenient and stable, which makes the product look full after printing and has better visual effects, and solves the problem of color difference after material replacement. Third, according to the customer's request, the pre-printed paint layer reduces the number of coloring processes in the customer's printing process, which further saves the customer cost.
Question 4: The brightness of vacuum aluminum plating materials is not enough to replace PET composite materials.
Problem 5: The aluminum layer is too thin, which may result in poor accuracy of the device or in the case of large ink droplets, which can easily cause scratches, print “ice”, sanding, and screen printing.
Question 6: The surface of vacuum aluminum plating material is rough and poor in smoothness, resulting in uneven coloration of the ink.
Answer: Questions 4, 5, and 6 can actually be answered together. Although the appearance of the problem is different, the factors that are formed are mainly concentrated on the manufacturing process and material selection. In terms of process, it is required that the production process of high quality, stable, and especially post-painting processes is the key to every production process of the material manufacturer. If the coating does not adhere well, the protective function of the coating cannot be used to ensure the wear resistance of the material. , Not aluminum, scratch resistance and other characteristics; in material selection, including the quality control of the substrate and glue. The first requirements for paper are:
First, with super-bright effect, like the new green using the Swedish "Iggesund" cigarette white paper as a substrate, visual white to 96 to 116 degrees or more, after the aluminized material can achieve the brightness of PET composite materials s level.
Second, the paper requires a good degree of flatness, such as ordinary paper as a substrate, the surface of the bump will lead to uneven sizing, aluminum powder adhesion degree is very small, encountered external force or multi-color printing easy to produce Scratches or aluminum powder.
Third, the surface roughness of the vacuum aluminum plating material and the smoothness of the substrate have a great relationship, similar to the effect of the mirror glass card substrate can effectively solve this problem. Followed by peeling glue and transfer glue, requiring better viscosity, and take into account the characteristics of wear, anti-peeling, such as green is based on materials developed adhesives to meet these characteristics.
Question 7: The mouth of the crease is prone to burst, especially when the ink is dark.
Answer: To avoid bursting phenomenon, firstly, use the base material with good folding resistance and molding degree. If paper with good softness is made of pure wood pulp fiber, this phenomenon can be effectively prevented; second, the paint layer should not be too thick; Third, the material of the peeling layer should be as soft as possible.
Question 8: After the printed products are put into place for a period of 1 to 2 months, an indefinite burst of ink will occur.
Answer: The reason for the ink explosion is that the surface coating is incompatible with the molecules in the ink. Therefore, it is proposed that the printing factory can provide a communication opportunity between the ink manufacturer and the material manufacturer before changing the vacuum aluminum coating material. settle properly. (Moderator: Wu Zhihong, special guests: Technical Leader of Shanghai Green New Packaging Industry Co., Ltd.)